Time to give credit where credit is due! Adding titles and credits is a classy way to present your video.
To add text to your video, click the text icon, which is a large T beneath the viewer. iMovie will give you a variety of styles to choose from. Once you’ve made your choice, you can drag the text to any point in the timeline. If you drag it to a point in the timeline where there is no video, iMovie will let you choose a background for it. Once you drop your text template into the timeline, you can edit what it will say in the viewer. You will also be able to choose font, color and size by clicking the ‘Show Fonts’ button in the top-left of the viewer.
Continue on to Exporting & Sharing.